Utility to extract and repack Android backups created with adb backup (ICS+).
Largely based on BackupManagerService.java from AOSP.
Usage:
Download the latest version of Bouncy Castle Provider jar
(bcprov-jdk15on-148.jar) from here:
http://www.bouncycastle.org/latest_releases.html
Drop the latest Bouncy Castle jar in lib/, import in Eclipse and adjust build path if necessary. Use the abe.sh script to start the utility. Syntax:
unpack: abe.sh unpack <backup.ab> <backup.tar> [password]
pack: abe.sh pack <backup.tar> <backup.ab> [password]
pack for 4.4: abe.sh pack-kk <backup.tar> <backup.ab> [password]
If you don't specify a password the backup archive won't be encrypted but only compressed.
Alternatively:
Use the bundled Ant script to create an all-in-one jar and run with: (you still need to put the Bouncy Castle jar in lib/)
java -jar abe.jar pack|unpack [parameters as above]
(Thanks to Jan Peter Stotz for contributing the build.xml file)
More details about the backup format and the tool implementation in the associated blog post:
http://nelenkov.blogspot.com/2012/06/unpacking-android-backups.html